样式: 排序: IF: - GO 导出 标记为已读
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Magnetic phase tuning in patronite-based VS4 nanowires J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-10 Renato B. Moreira, Leandro Seixas
Magnetic semiconductors have the potential to push the boundaries of emerging technologies like spintronics. They could change the way we process and store data by leveraging not just the electron charges, but also their intrinsic spin. Materials with low dimensionality, specifically one- or two-dimensional materials, are key to this advancement. Within this category, one-dimensional semiconductors
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Research on the hydrogenation behavior of magnetocaloric La0.8Ce0.2Fe11.51Mn0.19Si1.3 hot-pressed plates J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-09 Juan Cheng, Caiyin You, Na Tian, Yuan Deng, Lei Gao, Pengyu Wang, Yaru Guo, Zhaojie Li
The fabrication of La(Fe, Si)H plates is very challenging owing to the poor mechanical stability. In this work, La(Fe, Si) plates synthesized by hot-pressing remain mechanically robust after optimizing the hydrogenation process. The hydrogenation behavior was investigated through characterizing the phase structures and magnetocaloric effects of LaCeFeMnSi hydride plates. The saturated hydrogenation
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Design synthesis of hybrid stator type flux-switching bearingless permanent magnet memory machines J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-09 YiFei Yang, RenZhong Wang
A magnetic flux-switching type bearingless permanent magnet memory motor is proposed, which not only solves the problem of friction in high-speed rotating mechanical bearings, but also achieves the true effect of “variable flux” operation with almost no excitation loss through permanent magnets with low coercivity such as aluminum nickel cobalt that can be adjusted online by applying only instantaneous
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Coexisting magnetic interaction, critical behavior and magnetocaloric effect at high temperature in Fe50Ni50 soft ferromagnetic alloy J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-08 Mohit K. Sharma, Akshay Kumar, Kavita Kumari, Naveen Yadav, Ankush Vij, Bon Heun Koo
Herein, we report the structural, magnetic and magnetocaloric properties of FeNi alloy prepared through the planetary ball-mill. Rietveld analysis of the X-ray profiles confirmed the cubic crystallographic phase with the Fm-3 m space group. The magnetic characterization demonstrates that FeNi alloy exhibits the coexistence of magnetic interaction within the ferromagnetic phase with Curie temperature
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Large-scale synthesis of dense Fe3C via ultra-high pressure method J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-08 Chunwei Leng, G. Yang, Quanmin Xie, Yidi Li, Jun Yang, E. Ranjith Kumar
In this work, a highly-dense cementite (FeC) was synthesized via ultra-high pressure method (UHPM). Different raw batches were prepared under identical synthetic conditions (1000 °C and 4.0 GPa for 10 min). Large amounts of FeC were produced from the raw material consisting of ∼ 6 µm iron powder with ∼ 1.5 µm graphite, illustrating that the particle size and carbon source are critical for synthesizing
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An experimental investigation of selective laser melting parameters effects on ferromagnetic properties of pure iron in both the as-built and annealed conditions J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-08 Mohammad Ali Sajjadi, Mehdi Modabberifar, Moein Taheri, Mohsen Badrossamay, Milad Hemmati
In this study, the effect of selective laser melting (SLM) parameters on the magnetic properties of pure iron has been experimentally extracted both in the as-built (A-Built) and stress-relieved (H-Treat) conditions, and the optimum levels of the parameters have been determined for optimum magnetic properties. The SLM process parameters include laser power, scanning speed, and hatch spacing, and the
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Out-of-equilibrium voltage and thermal bias response of a quantum dot hybrid system coupled to topological superconductor J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-07 Piotr Trocha, Thibaut Jonckheere, Jérôme Rech, Thierry Martin
We investigate theoretically the out-of-equilibrium transport properties of a single-level quantum dot coupled to a normal metal electrode and attached to a topological superconductor. Both voltage and thermal bias responses of the system in the nonequilibrium regime are studied. To obtain transport characteristics we used the nonequilibrium Green’s function approach. Particularly, we calculated current
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Rietveld refinement and cation distribution of Zn-Al substituted NiFe2O4 ferrite nanoparticles J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-07 Vishwanath K. Mande, Rameshwar B. Borade, Vishnu B. Raut, Rajendra P. Pawar
A series of Zn-Al co-substituted nickel ferrites having general formula NiZnFeAlO with x = y = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0 were successfully synthesized by wet chemical sol–gel auto combustion method. The X-ray diffraction pattern with Rietveld refinement has confirmed the formation of monophase cubic spinel structured samples with space group Fd-3 m. It is found that the lattice constant (a)
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A systematic study of oxygen vacancy MediatedShort range and long range magnetic ordering in BaTi1-xFexO3(x = 0.02) J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-07 A. Banerjee, A. Das, A. Roychowdhury, A. Saha, D. Das, S. Sarkar
A systematic study on the magnetic properties of the BaTiFeO (x = 0.02) system with decrease in grain sizes is presented. The combined study of long range and short range magnetic orderings together was carried out. The samples were prepared in single tetragonal phase. The grains of the pristine sample were refined from micron to nanometer range by mechanical milling. Oxygen vacancies in different
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Magnetocaloric effect in Er[formula omitted]Gd[formula omitted]Al2 ([formula omitted]) alloys J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-07 Keisuke T. Matsumoto, Koume Terada, Kaho Yamasaki, Ren Takaaze, Atsushi Imada, Koichi Hiraoka
Measurements of magnetization () were performed on a series of ErGdAl ( 0.1, 0.25, and 0.5) alloys. ErAl and GdAl are ferromagnets with the Curie temperatures () of 14 K and 168 K, respectively. ErGdAl also showed a ferromagnetic order at 21 K for 0.1, 57 K for 0.25, and 89 K for 0.5. Upon cooling, curves of ErGdAl for exhibited a metamagnetic behavior. The field cooled for ErGdAl increased below 30
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Particle correlations in concentrated aqueous ferrofluids upon dilution by small-angle X-ray scattering J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-07 A.V. Nagornyi, M.V. Avdeev, V. Socoliuc, O.I. Ivankov, A.A. Tomchuk, L. Vékás
Small-angle X-ray scattering is applied to study particle correlations in concentrated (up to 7.5 vol% magnetite) aqueous magnetic fluids with double-layer coating by either oleic or lauric acids. The structure of aggregates in these fluids is analyzed when diluting samples with the goal of finding out a concentration threshold at which the aggregates can be considered weakly interacting independent
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The influence of Lu substitution on the microstructure, electromagnetic properties, and impedance of NiZnCo ferrite J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-07 Ruo-Ding Mao, Le-Zhong Li, Jian Tang, Xing Zhang, Yi-Lei Li, Wen-Ning Ren, Mu Lan, Sheng-Jiang Huang, Bing-Jie Wang, Yan Jiao, Xiao-Hui Wu
This investigation delves into the repercussions of substituting Lu ions for Fe ions on the microstructural, electromagnetic, and impedance characteristics of NiZnCo ferrite. Intriguingly, the research substantiates that Lu ions adeptly supplant Fe ions at the B site, precisely the octahedral locus, within the ferrite lattice. The considerable ionic radius of Lu instigates lattice distortion, concomitantly
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Thermomagnetic convection control strategies for electromagnetic devices immersed in a ferrofluid J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-06 Sleimane Nasser El Dine, Xavier Mininger, Caroline Nore
This paper presents new control strategies for improving the thermomagnetic convection intensity in electromagnetic devices. The system consists of a winding prototype immersed in a ferrofluid solution based on magnetic nanoparticles. The whole system is exposed to an external magnetic field generated by an annular magnet placed against the tank. When possible, experimental results are compared with
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Investigating magnetic, and magneto-electric properties of Nd doped [(1-y) Bi1-xNdxFeO3-yPbTiO3] solid solution J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-06 Ram Chhavi Sharma, Manoj Baloni, Hemant Singh
Magneto-electronic devices applications of room-temperature multiferroics have been made possible by recent developments. But the potential use of pure BFO in multifunctional devices is constrained by its antiferromagnetic nature and need substitution-induced modification to improve magnetic and magnetoelectric properties. In the present paper, attempt has been made to improve the magnetic and magnetoelectric
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Investigation of the influence mechanism of shield on the strong magnetic field during electromagnetic launch J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-06 Yuxin Yang, Peng Liu, Changsheng Li, Haojie Li, He Zhang
The electromagnetic launch process generates low-frequency pulsed magnetic fields with peak values reaching Tesla-levels, imposing greater demands on the interference immunity of electronics within projectiles. However, during the propagation of low-frequency pulsed strong magnetic fields, their characteristics are affected by the shielding properties of the surrounding medium materials, resulting
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Parametric excitations of coupled nanomagnets J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-05 Domonkos Laszlo Farkas, Gyorgy Csaba
We demonstrate that parametrically excited eigenmodes in nearby nanomagnets can be coupled to each other. Both positive (in-phase) and negative (anti-phase) couplings can be realized by a combination of appropriately chosen geometry and excitation field frequency. The oscillations are sufficiently stable against thermal fluctuations. The phase relation between field-coupled nanomagnets shows a hysteretic
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Oxygen adsorption on pristine MnBi and Ta-capped MnBi thin-films: Ab-initio study of structural and electronic properties, and magnetic anisotropy J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-02 U.F. Moukila Mberi Ndombo, B.R. Malonda-Boungou, H.B. Mabiala-Poaty, A.T. Raji, P.S. Moussounda
We have studied the structural and electronic properties, as well as magnetic anisotropy in oxidized MnBi thin film with and without tantalum (Ta) atom as a capping layer. Spin-polarized density-functional theory calculations with the generalized gradient approximation (GGA) including Hubbard correction, i.e., DFT+ have been employed. We found that the oxygen (O) atom binds more strongly to the MnBi
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Switching of magnetic bilayer nanotube ring with antiferromagnetically coupled layers in an annular field J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-01 Zheng-Nan XianYu, Tai-Min Cheng, Xiao-Dan Chi, An Du
The magnetization switching behavior of magnetic nanotube rings with core–shell structure is investigated by solving the Landau-Lifshitz-Gilbert (LLG) equation, focusing on the effects of the magnetic structure, interfacial exchange interactions, anisotropy constants, and transverse field on the coercivity of the system. The reduction of the coercivity of the magnetic nanorings can increase the magnetization
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Monte Carlo exploration of magnetic properties: Graphene and borophene comparison J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-01 Z. Fadil, Chaitany Jayprakash Raorane, Hussein Sabbah, R. El Fdil, Ahmad A. Ifseisi, R. Boopathiraja, P. Rosaiah, Abdulrahman A. Alsayyari, Seong Cheol Kim
This study employs Monte Carlo simulations to investigate the magnetic characteristics of graphene and Borophene lattices, emphasizing various physical parameters. Temperature-dependent variations in magnetization and susceptibility reveal a transition from ferromagnetic to superparamagnetic states, characterized by the blocking temperature (T). Borophene exhibits a higher T than graphene, suggesting
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Magnetization reversal and coercivity mechanism in ferrimagnetic M-type hexaferrite by controlling phase evolution J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-01 Sushree Nibedita Rout, Amar Dev, Sambit Kumar Biswal, Murli Kumar Manglam, Manoranjan Kar
The correlation of phase evolution (annealing at different temperatures) with magnetic properties like magnetization reversal, coercivity mechanism, and energy product in M-type hexaferrite by substituting Sr in place of Ba has been reported in the present article. The BaSrFeO (x = 0.0, 0.5, & 1.0) have been prepared by the sol–gel auto-combustion method followed by annealing at different temperatures
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Electronic states of the constituent magnetic elements, superior magnetic properties and spin-flip metamagnetic transition in Cu3Dy(SeO3)2O2Cl J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-01 P. Manna, S. Kanthal, A. Banerjee, G. Aquilanti, S. Sarkar, S.R. Barman, S. Bandyopadhyay
Dy based cuprate francisite [CuDy(SeO)OCl, in short DyCufr] is so far potentially the most fascinating magnetic compound in the class of francisite compounds. Synthesized DyCufr has been investigated via structural, X-ray absorption near edge structure (XANES), X-ray photoelectron spectroscopy (XPS) and magnetization measurements. XANES and XPS provide consistent and corroborative results regarding
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Al-doped BaFe12O19 hexaferrites: Dopant distribution in the crystal lattice and its effect on the magnetic order J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-03-01 V. Bilovol, R. Martínez García, M. Pagnola, S. Ferrari, F. Morales, J. Żukrowski, M. Sikora
We hereby conducted studies on the distribution of aluminum ions in the crystal lattice of doped BaFeAlO hexaferrite nanoparticles (x = 0.5, 1.0, 1.5 at. %) and their effect on the magnetic order of the ferrite. Fe Mössbauer spectroscopy, X-ray absorption spectroscopy, X-ray diffraction and magnetic measurements were used to elucidate the incorporation of Al into the barium hexaferrite (BaM) lattice
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Quantum SU(3)-ferrimagnet on triangular lattice J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-29 A.S. Martynov, D.M. Dzebisashvili
Manifestations of quantum effects in the macroscopic properties of frustrated magnets keep attracting considerable interest. We have formulated and studied a simple model of a three-sublattice mixed-spin () -ferrimagnet on triangular lattice in which the strong quantum fluctuations are developed due to combined effect of frustrated exchange bonds, reduced dimensionality and a single-ion easy-plane
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Magnetism and magnetocaloric effects in tetragonal structure of RE5Ni2Sb (R = Er, Ho) compounds J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-29 S.L. Yu, L. Tian, J.F. Wang, X.G. Zhao, D. Li, Z.J. Mo, B. Li
In this work, the RENiSb (RE = Er, Ho) compounds with tetragonal structure were successfully synthesized and the magnetism, magnetic phase transition and magnetocaloric effects were investigated. It was demonstrated that antiferromagnetic interaction undergoes a field-induced metamagnetic transition from antiferromagnetism to ferromagnetism in RENiSb (RE = Er, Ho) under a magnetic field higher than
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Frustration-enhanced spin Nernst conductivity in a single-layer honeycomb antiferromagnet J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-29 Hamid Mosadeq, Mohammad-Hossein Zare
We theoretically study the spin Nernst effect in collinear antiferromagnets on a honeycomb lattice with broken inversion symmetry. The broken inversion symmetry allows out-of-plane Dzyaloshinskii-Moriya interaction between the nearest neighbors. Within the semiclassical theory, the Dzyaloshinskii-Moriya exchange interaction, which generates an imbalance in the magnon distribution between the valley
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Influence of multiaxial isothermal forging on magnetocaloric effect and magnetostructural transition in Ni-Mn-Ga-Si alloy J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-28 I.I. Musabirov, R.Y. Gaifullin, A.B. Gadjiev, A.M. Aliev, E.T. Dilmieva, S. Krämer, Yu.S. Koshkid'ko
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The impact of spin-polarized current on the excitations of interface pinned domain walls J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-28 F.V.S. Diniz, T.G.M. Jales, L.L. Oliveira, S.M.B. Martins, A.S. Carriço, Ana L. Dantas
We report a theoretical study of the impact of spin-polarized currents on the excitation spectrum of a periodic sequence of domain walls in a Py™(NiFe) nanowire exchange coupled to a two-sublattices vicinal antiferromagnetic substrate. At low spin current densities, there are only minor changes in the magnetic equilibrium configuration. However, one may find relevant effects on the domain wall excitations
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Two split rings resonator-based perfect metamaterial absorbers with the incident and polarization angle independent for sensing applications J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-28 Mst Ishrat Jahan, Mohammad Ullah, Hamzah Ahmad, Rasidi Roslan, Izan Izwan Misnon, Rajan Jose
The perfect metamaterial absorber (PMA) optimized for high-performance absorbers to find the multiple sensing application. The structural composition of the PMA consists of two split ring resonators with six split gaps configured in an exhibit symmetry of rotation. The fundamental component of the design has three distinct layers: (1) the top and bottom layers, composed of a metallic substance with
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Tunable valley splitting in RuClF bilayer J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-28 Xujin Dang, Xianbin Zhang
Valleytronic devices are increasingly gaining attention for their unique capability to encode and process information by leveraging electronic valley degrees of freedom. In this study, we performed first-principle calculations to analyze the band dispersions of double-layer antiferromagnetic valley material RuClF subjected to an external electric field. Our findings show that the double-layered structure
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Eddy current losses model and physical parameters evaluation for ferrite magnetic cores in frequency domain J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-28 Vittorio Bertolini, Marco Stella, Riccardo Scorretti, Antonio Faba, Ermanno Cardelli
Accurate modeling of losses in ferrite cores is of high interest for power electronics design. Left aside the problem of modeling the constitutive law, accurate computation of losses require to model the 3d geometry, for instance by Finite Element (FE) analysis, which is computationally expensive. This hinders the practical usage of such models in circuit simulators which require “light” models. In
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Magnetic spirals and biquadratic exchange in 1D MoX3 spin chains J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-26 Andy Mella, Eric Suárez-Morell, Alvaro S. Nunez
We researched the one-dimensional configurations of MoX (X = Cl, Br, and I), a spin chain with antiferromagnetically frustrated moments located at the Mo sites. Our research revealed a spontaneous magnetic order in this group of one-dimensional setups. The magnetic system within the one-dimensional chain reacts collectively due to various magnetic couplings, creating topological spirals with great
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Experimentally determining the thermophysical properties, heat transfer and friction factor Fe3O4-TiO2 magnetic hybrid nanofluids in a mini-heat sink under magnetic field: Proposing new correlations J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-25 L. Syam Sundar, A.M. Alklaibi, Sangaraju Sambasivam, Kotturu V.V. Chandra Mouli
The heat transfer and friction factor for the FeO-TiO/water nanofluids flow circulate in a mini-heat sink with and without a magnetic field have been estimated experimentally. The FeO-TiO nanomaterial was prepared using chemical coprecipitation and sol–gel technique. Synthesized FeO-TiO nanoparticles were characterized by X-ray diffraction, and vibrating sample magnetometer. Uniform water diluted hybrid
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Magnetic properties of the amorphous Co-Fe-Cr-Si-B alloy after annealing in unsaturated magnetic field J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-23 Ekaterina N. Tokmakova, Vadim Yu. Vvedenskiy
The regularities of influence of temperature and intensity of a longitudinal magnetic field significantly less than the saturation field during annealing on the magnetic properties of an amorphous soft magnetic alloy based on Co have been studied. The possibility of the effectiveness of such treatment in comparison with traditional annealing without a field due to partial or complete suppression of
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Tuning properties of phase-separated magnetic fluid with temperature J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-23 Laura Nelsone, Guntars Kitenbergs
Phase-separated magnetic fluids provide a very strong magnetic response () in a liquid state material. Even small fields can cause a notable material response, but this depends on its properties, which are often difficult to control. Here, we investigate how temperature affects the properties of the system, where phase separation is induced by an increase in ionic strength. Following the deformations
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Magnetism of MoS2 bilayers with intercalated and surface adsorbed Fe J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-23 Yukie Kitaoka, Akiko Ueda, Hiroshi Imamura
Magnetic thin films composed of two-dimensional van der Waals materials will play an important role in future spintronics devices. Recently, Tuli et al. performed MOKE measurements of Fe deposited on an MoS substrate and found that a magnetic dead layer (MDL) exists up to approximately 2 Å (Tuli et al. (2021)). To understand the origin of the MDL, we investigate MoS bilayers with intercalated and surface
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Preparation and analysis of Mn1-xZnxFe2O4 nanoparticles coated with chitosan for use as a heating agent and MRI contrast agent in biomedical applications J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-23 Shamima Nasrin, F.-U.-Z. Chowdhury, M. Moazzam Hossen, S. Manjura Hoque
Nanoferrites, day by day become the center of attraction due to their acceptability as contrast agents due to their enhanced properties. Wet chemical coprecipitation was used to prepare MnZnFeO nanoparticles. In order to apply the material for biomedical applications, the nanoferrites were also coated with the biodegradable material chitosan. XRD spectra confirmed the spinel ferrite configuration.
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Sputtering pressure dependence of microstructure and magnetoresistance properties of non-uniform Co–ZnO nanocomposite film J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-23 Aoke Sun, Yiwen Zhang, Zhong Wu, Zhenbo Qin, Huiming Ji, Xinjun Liu, Junpeng Luo, Wenbin Hu
Co-ZnO metal–semiconductor nanocomposite films have become the focus of attention in recent years since their magnetoresistance (MR) effect at room temperature (RT). In this study, non-uniform Co-ZnO nanocomposite films were prepared by magnetron co-sputtering method. With sputtering pressure increasing, the formation of ferromagnetic Co clusters is suppressed effectively, and the metallic-state superparamagnetic
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Current reconstruction approaches of magnetic particle imaging: A review J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-23 Lizhi Zhang, Jintao Li, Jiarong Du, Ge Fang, Diya Zhang, Zijian Tang, Hongbo Guo, Xiaowei He
As a non-invasive imaging technique, Magnetic Particle Imaging (MPI) relies on the detection of superparamagnetic nanoparticles to visualize biological processes with exceptional sensitivity and temporal-spatial resolution. Image reconstruction plays a crucial role in MPI, as it involves converting induced voltage signals into detailed images of the concentration distribution of superparamagnetic iron
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Site preference of the 3d transition metal ions in the Mn4−xFexNb2O9 compounds as revealed by Mössbauer spectroscopy J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-22 Bo Zhang, Jijun Xue, Yantao Cao, Qifeng Kuang, Da Li, Hanjie Guo, ZhenHua Li, Liyun Tang, Hua Pang, Fashen Li, Zhiwei Li
In this paper, we report on structural, magnetic, Mössbauer spectroscopy and density functional theory (DFT) studies of the MnFeNbO compounds. Temperature dependent magnetization measurements have shown that the paramagnetic to antiferromagnetic transition temperatures, , depend non-linearly on the Fe doping level , which is different from earlier studies on similar compounds of MnCoNbO. More interestingly
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Micromagnetic simulations of emergent monopole defects and magnetization reversal in connected and dipolar Square Artificial Spin Ice J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-20 Charu Singh, Daan M. Arroo, Nirat Ray
Artificial spin ice (ASI) structures have garnered significant attention due to their unique properties including emergent magnetic monopoles, phase transitions, and collective switching dynamics. In this study, we employ micromagnetic simulations to investigate the magnetic microstates and magnetization reversal dynamics of square ASI with varying connectivity. In particular, we explore an intermediate
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Stochastic dynamics of Galton board based on magnetic skyrmions J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-20 Xuejuan Liu, Tijjani Abdulrazak, Yinghui Zhang, Peng Yan
Conventional Galton board is an iconic model in statistics to study the stochastic dynamics of particle with ideal hypothesis of equal probability. To test this hypothesis, we introduce an artificial spin network by utilizing skyrmion clusters in ultrathin ferromagnetic films, resembling a nanoscale magnetic Galton board. We show that the board output exhibits a standard Gaussian distribution when
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Metal magnetic memory characterization of fatigue crack propagation of Q345qD bridge steel under the influence of stress ratio J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-20 Sanqing Su, Junting Li, Wei Wang, Xinwei Liu, Fuliang Zuo, Ruize Deng
Fatigue fracture failure has been one of the major causes of damage in steel bridges. To better use fracture mechanics to study this failure behavior, the fatigue crack growth behavior of bridge steel plates under different stress ratios was investigated by metal magnetic memory nondestructive testing technique. The changes of magnetic signals during fatigue crack growth were recorded and analyzed
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S-band application: Ultra-slim metamaterial absorber unit cell with dual-negative characteristics and polarization neutrality J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-19 Mayank A. Ardeshana, Falgunkumar N. Thakkar, Sunayana G. Domadia
The current work offers an electromagnetic metamaterial absorber that uses the double-a1Qnegative property and is designed for operation in the 1 to 4 GHz frequency range, with a peak absorption at 3.31 GHz, emphasizing S-band applications. The suggested structure is very thin, having a total absorber thickness of 0.0184 λ. It was constructed using CST software and simulated with a frequency domain
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Effect of field amplitude on kinetics of remagnetization of immobilized magnetic nanoparticles J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-19 A. Yu. Zubarev, L. Yu. Iskakova
We present results of theoretical study of effect of magnetic field amplitude on remagnetization kinetics of a single-domain ferromagnetic particle immobilized in a nonmagnetic medium. Magnetic anisotropy of the particle is supposed strong. Our results, based on the mathematically robust Kramers theory, demonstrate that intensity of the heat production (Specific Heat Production, SHP) in the particle
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Observation of pinning and pinning evasion dynamics of a magnetic vortex core J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-19 M. Mehrnia, J. Berezovsky
An understanding of the dynamics of magnetic textures as they interact with defects in the host material is critical for proposed applications that depend on controlled translation of these magnetic textures. We report on the experimental observation of magnetic vortex core (VC) trajectories as they are affected by a potential energy landscape arising from defects in thin, permalloy disks. We first
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Synergistic effects of the surface grain coarsening and the grain boundary phase magnetism on the magnetic properties of Re-Fe-B (Re: Rare earth elements) magnets after the grain boundary diffusion J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-17 Jie Wang, Fugang Chen, Zhong Lei, Yong Zhao, Juan Fu, Zhi Xu
The grain boundary diffusion process (GBDP) is one of the most popular methods to enhance the coercivity of -Fe-B (: Rare earth elements) magnets. The surface grain coarsening is the common characteristic for the sintered -Fe-B magnets after GBDP. However, the effect of the coarse surface grains induced by GBDP on the magnetic properties has not been thoroughly studied. In this work, sintered Nd-Ce-Fe-B
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Formation of Mn-rich interfacial phases in Co2FexMn1-xSi thin films J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-17 Ka Ming Law, Arashdeep S. Thind, Mihir Pendharkar, Sahil J. Patel, Joshua J. Phillips, Chris J. Palmstrom, Jaume Gazquez, Albina Borisevich, Rohan Mishra, Adam J. Hauser
We report the formation of Mn-rich regions at the interface of CoFeMnSi thin films grown on GaAs substrates by molecular beam epitaxy (MBE). Scanning transmission electron microscopy (STEM) with electron energy loss (EEL) spectrum imaging reveals that each interfacial region: (1) is 1–2 nm wide, (2) occurs irrespective of the Fe/Mn composition ratio and in both Co-rich and Co-poor films, and (3) displaces
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Investigation on the physical origins of laser effects on anisotropic magnetic properties of GO electrical steels by means of thermal annealing J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-17 Préscillia Dupont, Olivier Maloberti, Julien Dupuy, Camille Pineau, Jean-Pierre Birat, Maxime Ployard, Daniel Laloy, Jérôme Fortin
Both conventional laser surface treatments (irradiation or scribing) and recently developed ablation process performed with UltraShort Pulse Lasers (USPL) can improve magnetic properties of Grain-Oriented Electrical Steels (GOES) along their Rolling Direction (RD). While pushing the study of laser treatments further, interesting power loss reductions could also be obtained along the Transverse Direction
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Influence of nanoparticles morphology in magnetic fluids J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-17 A. Gómez, A. Barón, J. Berasategi, M. Blanco, A. García, J. Gutiérrez, D. Iglesias-Rojas, M. Insausti, S. Lanceros-Mendez, C.R. Tubio, M.M. Bou-Ali
In this work magnetic fluids at two different volume concentrations (5 % and 10 %) of magnetite nanoparticles of different morphologies and sizes (octahedral, 38 ± 5 nm; truncated octahedral, 10 ± 1 nm; rod-like, 95 nm x 10 nm; spherical 33 ± 20 and 90 ± 10 nm) have been formulated (by using mineral oil as liquid carrier and Aerosil®300 as viscosity-controller agent) and fabricated. The obtained results
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Effect of swap and antisite disorder on electronic, mechanical and thermodynamic properties of equiatomic all-d-metal Heusler alloy NiVTiZn J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-17 Man Lu, Qianru Wang, Yinsheng Zhao, Qian Wu, Bo Wu, Yu Feng, Li Liu
The influence of atomic disorder on electronic, mechanical and thermodynamic properties of equiatomic quaternary all- metal Heusler alloy NiVTiZn is studied by employing the first-principles calculations. The ground state of NiVTiZn is confirmed to be -type structure with ferromagnetic nature, the calculated spin down energy gap and equilibrium lattice constant is ∼0.7 eV and 6.048 Å, respectively
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Effect of progressive substitution of spin-3/2 by spin-7/2 on the magnetocaloric properties of a mixed spin binary alloy system: A Monte Carlo study J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-17 Putul Malla Chowdhury, Manotosh Chakravorty
Using Monte Carlo simulation the concentration dependency of the cooling exponent () of a binary alloy AB mixed spin system (7/2, 3/2) was studied rigorously. For low magnetic field () the entropy change , excellently follows the relation . The exponent hardly changes with within the region 0.5 < < 0.75. But for further increment of > 0.75, sharply drops down. The exponent is strongly affected by the
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Magnetic anisotropy reduction of non-grain oriented electrical steel due to different stress relief annealing temperatures J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-17 Edivânia Maria Martins Alves, Carolina Cesconetto Silveira, José Rogério de Oliveira Júnior, Fernando José Gomes Landgraf
The present research investigated the influence of different stress relief annealing (SRA) temperatures on the microstructure and magnetic properties of an NGO electrical steel. Epstein samples sheared on the rolling and transverse directions (RD, TD) were submitted to heat treatments at temperatures from 643 to 832 °C in a protective atmosphere. The magnetic properties on the 100 %RD, 100 %TD and
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Numerical study on temperature distribution during magnetic hyperthermia of different tumor tissues J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-17 Md. Ezaz Ahammed, Ajay Kumar Yadav, T. Laxminidhi
In recent years, nanotechnology has made an invasion in biomedical applications which has gained much more attention because of its high efficiency and low side effects.One such applicationis magnetic hyperthermia (MHT) where magnetic nanoparticles (MNPs) are used to generate heat to kill the cancerous tissues over an alternating magnetic field.The heat generated by the nanoparticles is caused by hysteresis
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Production of 2 μm-thick 6.5 % Si-Fe cold rolled sheet J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-16 Takuya Uemura, Junpei Tanase, Keisuke Fujisaki, Kazushi Ishiyama, Eiji Tsuchida
Although 6.5% Si-Fe alloys have excellent magnetic properties, they have not been used in practical application because they are mechanically hard and brittle. In this study, we attempted an extremely thin 6.5% Si-Fe to realize a high-frequency, low-loss magnetic material, which is highly demanded for next-generation power electronic circuits. It was found that 6.5% Si-Fe with a thickness of 20 µm
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Computational analysis of entropy generation minimization and heat transfer enhancement in magnetohydrodynamic oscillatory flow of ferrofluids J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-16 Muhammad Idrees Afridi, Zhi-Min Chen, Muhammad Qasim, Oluwole Daniel Makinde
Improvements in heat transfer rate and entropy generation minimisation are critical issues in many engineering and industrial applications where efficient heat transfer is essential to achieve optimal performance and lower energy consumption. This study investigates the entropy generation of the mixed convection flow of ferrofluids in the presence of viscous and Joule dissipation. The flow is oscillatory
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Optimization design on cooling structure of High-Temperature magnetic fluid dynamic seal device J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-16 Chengji Mi, Yingang Xiao, Shiyong Yuan, Xin Xie, Chen Zhang, Yingjian Deng, Ling Zhang, Yinghong Tang, Jiachang Tang
In order to better sealing performance of magnetic fluid at high temperature, structural optimization design of cooling component in magnetic fluid dynamic sealing device at high temperature is studied in this paper. The magnetic field model of magnetic fluid sealing device at high-temperature is established to analyze the influence of temperature on the sealing performance of magnetic fluid, and magnetic
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Study of Bejan number and entropy generation for mixed convection of nanofluid flow inside a chamber under an inclined magnetic field J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-16 Saeed Alqaed, Fahad Awjah Almehmadi, Mohsen Sharifpur, Jawed Mustafa
Examination of the efficiency and losses in heat exchange devices is pivotal. Therefore, the entropy generation (EYG) and Bejan number (Be) of mixed convective heat transfer of nanofluid flow in a rectangular cavity (RCY) are evaluated in this study. Five baffles are placed at the lower hot wall of the RCY. The cold upper wall moves and causes forced convection flow of nanofluid. The magnetic field
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Residual stresses assessment on waterjet peening metallic biomaterials by thermoelectric magnetic sensing J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-16 H. Carreon, M. Carreon-Garcidueñas
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Stabilization of permalloy nanoparticles for syringe printable inductors J. Magn. Magn. Mater. (IF 2.7) Pub Date : 2024-02-16 Rebecca L. Fedderwitz, Jason Fleischer, Vincent T. Lan, Kobe B. Grismore, Alexander A. Gutierrez, Riordan Correll-Brown, Christia S. Ellerman, Donghun Park, Peter Kofinas
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